As a primarily casual magic player, i often find myself concocting a somewhat large number of decks, and I thought i find myself constantly thinking is "I wish i had another play set of lightning bolts". So after thinking about this for a while i got to wondering if anyone else has adapted to relentlessly collecting any number of the same card.
Some examples that are my personal favorites are;
Lightning bolt
Terminate
Blighting
Mana Leak